 The A26 then reaches another aviation-related landmark at a roundabout, the site of the former RAF Nutts Corner base.Traffic following the A26 takes a turn to the right, and continues, by-passing the villages of Crumlin, County Antrim, Glenavy and Upper Ballinderry, crossing the currently disused Lisburn–Antrim railway near the latter.The A26 then goes under the Belfast-Newry railway and then meets the M1 at its junction with the A3 road, and multiplexes with the A3 through the villages of Moira and Magheralin.